Liquid-fuel burner.



G. W. THEXTUN.

LIQUID FUEL BURNER.

APPLICATION FILED FEB. 9, l1914.

LQQ, Patented Feb. 23, 1915.

wmmi

Wllmf/@Jsev luv@ #dwf/f:

@jfl VBgMMMMf/ THE NDRRIS PETEPS Co., PHOTG-LITHO., WASHINGmN, D. C.

suenen wrLLrAi/r Trinitron, orl MILWAUKEE, wisconsin. l

LIQUID-FUEL lavarse.

ideario.

specificati@ of Letters Patent.

Patented Feb. 23, 1915.

Application filed'eebruary 9, 1914. Serial No. 817,487.

T0 all whom t may concern Be it known that I, GEORGE WILLIAM Trrnxrolv, a British subject, residing'at'Mil waulree, in the County of'Mil'waukee and State of lllfisconsim have invented certain new and useful Improvementsr in Liquid- Fuel Burners, of which the followingis a specification', reference losing had to the accompanying '.drawing,` forming a part thereof. f

This invention relates more particularly to burners having a wick tubey or generat ing chamber or section andv a vertically movable mixing and combustion chamber or section located above the wicktube or gen1 erating chamber. l

Themain objects of the invention are to provide for an intimate' and througlr mix= ture of air with the fuel' vapor or gasv inthe requisite proportions to insure complete and perfect combustion of the fuel without smoke or odor; to producea hot blue flame with kerosene or other liquid fuel vfor. oboking and other purposes; to prevent the formation and deposit of carbon; and generally to improve the construction and 0peration of burners of this class.

lt .consists in the construction, arrangement and combination of parts asl hereinafter particularly described and pointed out in the claims. f

.ln the accompanying drawing like charac` ters designate the same parts in the several figures n Figure l is a vertical medial section of a burner embodying the invention; Fig. 2 is a vertical section on a'reduced scale of a stove frame as equipped with a burnercf this kind,`the upper part ofthe burner being shown in elevation and the lower part invertical medial section; and Fig. Sis,2 a plan view of onel of the spidersy or" guides inV the wick tube for the rod which carries the upper part of the burner.

Referring to Figs. l and 2", the burner comprisesa vapor or gas generating section and a vertically movable vapor or gas* and air mixing and 'combustion section.

The lower or generating section may consist as shown, of a double walled annular wick tube and liquid fuel chamber a, which is closed at the lowerend andusl'ual'ly'mounted as shown in Fig. 2, on a suitable VbaseIk Zn', such as the baseplate of a stove frame." The wick tube'or fuel chamber" is provided with spiders or cross pieces c, one of which is shown in; Fig. 3, having central openings to receive and guide a vertical rod d, which carries the upper seotionof` the burner, as hereinafter explained.

The upper section of the burner comprises coaxial perforated tubes `@forming an annular mixing and combustion chamber which is arranged to register at its lower end with the upper open end vof the wick tube or fuelchamber a, as shown in Fig. l.V The outer tubel .e is perforated with small holes its entire length, or approximately so. while the inner tube has an imperforate belt or zone g, adjacent to its upper end.' The inner tube e is fitted and held at its ends inl marginal folds or grooves' of circular heads It and z'. 1

A central air tube j., of smaller diameter than the inner' tube e and openat its/lower end, is fitted and held at the ends in circular recesses pressed or formedin the heads li and i, which close the annular space b'e,

tween and at the ends of Vsaid tubes. The lower head z' is formed with a central air in let vmening 7c, and the `upper head 71, yis formed with a number of vent onoutlet openings Z, for admitting air into the lower end of the tube j and allowing a portion of it `to escape from the upper end of said tube.y

A- cap m, fitted to'and seated against the under side of the head 'QI around the opening 7c therein andconstituting in effect an extension of the air tube j below said head, is formed in the sides-with air inlet openings n. The tube j is formed in the sides above and adjacent .to the lower head t', with openings o, to allow the greater portion'of the air entering 'said tube to pass therefrom into the annular space between it and the inner tube e. The rod d, which passes upwardly through central openings in the cap m and in the upper head 7a, is formed or provided with a collar or shoulder 79, below and engaging with the cap m, and isV secured at its upper endl in the" upper headt` by a nut 7, orr other suitable means, thereby tying the cap and heads together and holding the heads' in engagement with ythe inner tube e and the tube j.

A cylindrical shield rsurrounding the outer tube e and extending some distance above and belowthe same, is secured with said tube to the inner tube e by bolts or rivets s and spacing sleeves t. `The shield r,

which is open at its lower end, is preferably contracted at its upper end, which is open above the tubes e.

To facilitateconnecting the burner with a fuel supply pipe and removing the same therefrom for the purpose of cleaning or repairing the burner, the following coupling means are provided: The wick tube or fuel chamber a, is provided, as shown in Figs. l and 2, with a nipple u, which has a semispherical end and lugs 'v on opposite sides thereof. The supply pipe w is formed in one side with an opening and a semi-spherical seat around the opening in which the end of the nipple is fitted. A hooked and forked clamp m, removably itting over the pipe fw and adapted to engage with the lugs lv', is provided with a set screw y, which by engagement with the pipe, is adapted to force and hold the spherical end of the nipple tightly against its-seat in the pipe.

The wick tube or fuel chamber a, is to be provided with a wick, which is adjusted for lighting, extinguishing and regulating by the usual or any suitable means (not shown).

The upper. section of the burner is lifted for lighting the wick, and is held in an elevated position out of contact with the burner tube and wick, as shown in Fig. 2, by the following means: A lever a, fulcrumed to alug on the under side of the base b, projects at its inner end underneath and is adapted to engage with the lower end of the rod cl. At its outer end said lever is provided with a pivot-ed handle or operating and locking piece 3, which extends upwardly therefrom through a slot or opening in the lbase b and is formed with a notch or shoulder adapted by engagement with the base when the lever is depressed, to hold the upper section of the burner in an elevated position out of Contact with the wick tube and wick.

In ythe operation of the burner, the upper section thereof is lifted, as shown in Fig. 2, to light the wick. rlhe wick having been lighted and properly adjusted, the uppersection is released by pushing the operating piece 3 backward out of engagement with the base b, thus permitting the perforated tubes e forming the mixing and combustion chamber, tol descend and rest upon the upper ends of the walls of the wick tube a, as shown in Fig. 2. Air passing upwardly through an opening in the base b, wick tube a and openings n in cap m, enters the tube y' through opening k in the lower head z', and passing thence through the openings o into the annular space around said tube, enters the mixing and combustion chamber f through the small holes in the inner tube e. At the same time, air entering the lower end of the shield 1' around the wick tube a, passes through the small holes in the outer tube e into the mixing and combustion chamber f, where it and the air entering through the inner tube e, mixes and unites with the burning vapors and gases produced by and rising from the burning wick, the oil or liquid fuel being supplied to the flame by the capillary action of the wick in the usual manner. The combustion of the fuel vapor or gas generated by the burning oil or liquid fuel at the upper end of the wick with the heated or warm air supplied thereto through the perforations in the tubes e, produces an intensely hot blue flame, which issues from the combustion chamber through the contracted opening in the upper end of the shield 7'. A portion of the air drawn into the lower end of the tube 7' escapes therefrom through the vent openings Z in the upperhead 7i into the central portion of the flame, further aiding combustion of the fuel. The metal walls of the upper section of the burner soon become heated and impart heat to the air which is drawn into the lower end of the tube 7' and the lower end of the shield 1, and which passing through the small distributed holes in the tubes e, is thoroughly mixed with the burning fuel vapor or gas generated in the lower end of the chamber f, thereby producing complete combustion and an intensely hot blue flame at the upper end of the combustion chamber.

When the burner is not in use, the upper section is lifted out of contact with the burner tube and locked in an elevated position, as shown in Fig. 2, by depressing the front or outer end of the lever a and drawing the operating and locking piece Sforward into engagement with the base 7). This prevents oil or liquid fuel from collecting on the lower ends of the tubes e and producing smoke and odor when the burner is lighted. In this position of the upper section the upper end of the wick and wick tube are accessible for cleaning and lighting.

Various changes in minor details of construction and arrangement of parts may be made without departing from the principle and scope of the invention as defined in the following claims.

I claim:

l. In a liquid fuel burner the combination with a lower vapor or gas generating section, of an upper section comprising coaxial perforated tubes, forming an annular mixing and combustion chamber, heads engaging the ends of the inner tube, the lower head having. an air inlet opening, and a vertical rod connecting said heads and tying them together in engagement with the inner tube.

2. In a liquid fuel burner the combination with a lower vapor or gas generating section, of an upper section comprising coaxial perforated tubes formingv an annular mixing and combustion chamber, a central air tube of smaller diameter than and coaxial with the inner perforated tube, and having an air inlet opening at its lower end, heads engaging the ends of the inner perforated tube and the air tube and closing the space between them, and a verticalk rod connecting said heads and tying them together, said air tube having an opening above and adjacent to the lower head.

3. In a liquid fuel burner the combination with a lower vapor or gas generating section, of an upper section comprising coaxial perforated tubes forming an annular mixing and combustion chamber, the inner tube having an imperforate belt adjacent to its upper end, and heads engaging the ends of the inner tube and confining it in place, the lower head having an air inlet opening.

t. In a liquid fuel burner the combination with a lower vapor or gas generating section, of an upper section comprising coaxial perforated tubes forming an annular mixing and combustion chamber, a central air tube coaxial with the perforated tubes, heads en gaging the ends of the inner perforated tube and the air tube and closing the annular space between them, an extension of the air tube depending from the lower head and having an air inlet opening in the side, said air tube having an opening in the side above and adjacent to the lower head, and a vertical rod connecting the upper head and the extension at the lower end of the air tube and tying the heads, inner perforated tube and air tube, together.

5. In a liquid fuel burner the combination with a lower vapor or gas generating section comprising a double walled wick tube, of an upper section comprising coaxial perforated tubes forming an annular mixing and combustion chamber registering at its lower end with said wick tube, the outer tube being perforated approximately from end to end and the inner tube having an imperforate portion adjacent to its upper end, a central air tube, heads engaging the ends of the inner perforated tube and the air tube and closing the space between them, an exten- Sion of the air tube depending from the lower head and having a lateral air inlet opening, the upper head having an air vent opening communicating with the upper end of the air tube and the air tube having a side opening above and adjacent to the lower head, and a vertical rod connecting the upper head with said extension and tying the heads, inner perforated tube and air tube together.

6. In a liquid fuel burner the combination with a fixed lower section comprising a double walled wick tube, of a vertically movable upper section comprising coaxial perforated tubes forming an annular mixing and combustion chamber adapted to register at its lower end with the wick tube, a shield surrounding said tubes at a distance from the outer tube and secured therewith to the inner tube, a central air tube, heads engaging the inner perforated tube and the air tube and closing the space between them ad jacent to their ends, an extension of the air tube depending from the lower head and having an air inlet opening, said air tube having a side opening above and adjacent to the lower head, and a vertical rod tying said heads together in engagement with the inner perforated tube and the air tube and guided longitudinally in the wick tube.

7. The combination with a base, a liquid fuel burner comprising a fixed wick tube mounted on said' base and provided with a guide, a vertically movable section comprising coaxial perforated tubes forming an annular mixing and combustion chamber adapted to register at its lower end with the wick tube, heads engaging the ends of the inner perforated tube, a vertical rod tying said heads together in engagement with said inner tube and projecting downwardly through said guide, a lever fulcrumedf to said base and arranged to engage with the lower end of said rod for lifting said movable section, and an operating piece pivoted to said lever and having a shoulder adapted by engagement with the base to hold the movable section in an elevated position.

Jackson, Mich., Feb. 2nd, 1914.

GEORGE WILLIAM THEXTON.

Signed in the presence of NINA A. STROBEL, LENA M. REYNOLDS.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. U. 

